Laminate construction
Abstract
Abstract This disclosure relates to a novel method of forming a tear line in a laminated as well as the laminate per se and methodwise incudes the steps of providing a tool having a heated edge, applying the heated edge to a laminate under pressure to effect a heating and flowing of a stiffening layer thereof, and effecting relative movement of the laminate and the tool along a predetermined line to form a weakening line in the stiffening layer. Preferably though not necessarily the article is composed solely of a metal foil layer and a thermoplastic resin stiffening layer with the thermoplastic resin stiffening layer having a weakening line molded in the surface thereof remote from the foil layer.
Inventors
- 👤 R Lurie
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |